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18 April 2024

» arxiv » 1512.6988

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Strange meson production in Al+Al collisions at 1.9A GeV
P. Gasik ; K. Piasecki ; N. Herrmann ; Y. Leifels ; T. Matulewicz ; A. Andronic ; R. Averbeck ; V. Barret ; Z. Basrak ; N. Bastid ; M.L. Benabderrahmane ; M. Berger ; P. Buehler ; M. Cargnelli ; R. Čaplar ; P. Crochet ; O. Czerwiakowa ; I. Deppner ; P. Dupieux ; M. Dželalija ; L. Fabbietti ; Z. Fodor ; I. Gašparić ; Y. Grishkin ; O.N. Hartmann ; K.D. Hildenbrand ; B. Hong ; T.I. Kang ; J. Kecskemeti ; Y.J. Kim ; M. Kirejczyk ; M. Kiš ; P. Koczon ; R. Kotte ; A. Lebedev ; A. Le Fèvre ; J.L. Liu ; X. Lopez ; V. Manko ; J. Marton ; R. Münzer ; M. Petrovici ; F. Rami ; A. Reischl ; W. Reisdorf ; M.S. Ryu ; P. Schmidt ; A. Schüttauf ; Z. Seres ; B. Sikora ; K.S. Sim ; V. Simion ; K. Siwek-Wilczyńska ; V. Smolyankin ; K. Suzuki ; Z. Tymiński ; P. Wagner ; I. Weber ; E. Widmann ; K. Wiśniewski ; Z.G. Xiao ; I. Yushmanov ; Y. Zhang ; A. Zhilin ; V. Zinyuk ; J. Zmeskal ;
Date:	22 Dec 2015
Abstract:	The production of K$^+$, K$^-$ and $varphi$(1020) mesons is studied in Al+Al collisions at beam energy of 1.9A GeV which is close or below the production threshold in NN reactions. Inverse slopes, anisotropy parameters, and total emission yields of K$^{pm}$ mesons are obtained. A comparison of the ratio of kinetic energy distributions of K$^-$ and K$^+$ mesons to the HSD transport model calculations suggests that the inclusion of in-medium modifications of kaon properties is necessary to reproduce the ratio. The inverse slope and total yield of $phi$ mesons are deduced. The contribution to K$^-$ production from $phi$ meson decays is found to be [17 $pm$ 3 (stat) $^{+2}_{-7}$ (syst)] %. The results are in line with previous K$^{pm}$ and $phi$ data obtained for different colliding systems at similar incident beam energies.
Source:	arXiv, 1512.6988
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